/*
 * @Description: 自定义指令
 * @Author:
 * @Date:
 * @LastEditors: denghong
 */


import Vue from "vue";
/* 1 注册一个全局自定义  聚焦指令 `v-focus`  */
/* 注意  使用这个指令后，貌似组件自带的聚焦就不能用了 */
Vue.directive("focus", {
  // 当被绑定的元素插入到 DOM 中时……
  inserted: function (el) {
    // 聚焦元素
    el.focus();
  },
});

/*2 注册一个全局自定义  防抖指令 `v-disable` */
Vue.directive("disable", {
  inserted(el, binding) {
    el.addEventListener(binding.arg || "click", () => {
      if (!el.disabled) {
        el.disabled = true;
        el.classList.add("is-disabled");
        setTimeout(() => {
          el.disabled = false;
          el.classList.remove("is-disabled");
        }, binding.value || 1000); //可以传入参数value
      }
    });
  },
});

/* 3 注册一个全局自定义指令 v-dialogDrag: 弹窗拖拽 */
Vue.directive("dialogDrag", {
  bind(el, binding, vnode, oldVnode) {
    const dialogHeaderEl = el.querySelector(".el-dialog__header");
    const dragDom = el.querySelector(".el-dialog");
    dialogHeaderEl.style.cursor = "move";

    // 获取原有属性 ie dom元素.currentStyle 火狐谷歌 window.getComputedStyle(dom元素, null);
    const sty = dragDom.currentStyle || window.getComputedStyle(dragDom, null);

    dialogHeaderEl.onmousedown = (e) => {
      // 鼠标按下，计算当前元素距离可视区的距离
      const disX = e.clientX - dialogHeaderEl.offsetLeft;
      const disY = e.clientY - dialogHeaderEl.offsetTop;

      // 获取到的值带px 正则匹配替换
      let styL, styT;

      // 注意在ie中 第一次获取到的值为组件自带50% 移动之后赋值为px
      if (sty.left.includes("%")) {
        styL =
          +document.body.clientWidth * (+sty.left.replace(/\%/g, "") / 100);
        styT =
          +document.body.clientHeight * (+sty.top.replace(/\%/g, "") / 100);
      } else {
        styL = +sty.left.replace(/\px/g, "");
        styT = +sty.top.replace(/\px/g, "");
      }

      document.onmousemove = function (e) {
        // 通过事件委托，计算移动的距离
        const l = e.clientX - disX;
        const t = e.clientY - disY;

        // 移动当前元素
        dragDom.style.left = `${l + styL}px`;
        dragDom.style.top = `${t + styT}px`;

        // 将此时的位置传出去
        // binding.value({x:e.pageX,y:e.pageY})
      };

      document.onmouseup = function (e) {
        document.onmousemove = null;
        document.onmouseup = null;
      };
    };
  },
});

/* 3 注册一个全局自定义指令 v-dialogDragWidh: 弹窗拖拽,双击全屏，右下角拖拽 */
Vue.directive("dialogDragWidh", {
  bind(el, binding, vnode, oldVnode) {
    //弹框可拉伸最小宽高
    let minWidth = 400;
    let minHeight = 300;
    //初始非全屏
    let isFullScreen = false;
    //当前宽高
    let nowWidth = 0;
    let nowHight = 0;
    //当前顶部高度
    let nowMarginTop = 0;
    //获取弹框头部（这部分可双击全屏）
    const dialogHeaderEl = el.querySelector(".el-dialog__header");
    //弹窗
    const dragDom = el.querySelector(".el-dialog");
    //给弹窗加上overflow auto；不然缩小时框内的标签可能超出dialog；
    dragDom.style.overflow = "auto";
    //清除选择头部文字效果
    dialogHeaderEl.onselectstart = new Function("return false");
    //头部加上可拖动cursor
    dialogHeaderEl.style.cursor = "move";

    // 获取原有属性 ie dom元素.currentStyle 火狐谷歌 window.getComputedStyle(dom元素, null);
    const sty = dragDom.currentStyle || window.getComputedStyle(dragDom, null);

    let moveDown = (e) => {
      // 鼠标按下，计算当前元素距离可视区的距离
      const disX = e.clientX - dialogHeaderEl.offsetLeft;
      const disY = e.clientY - dialogHeaderEl.offsetTop;

      // 获取到的值带px 正则匹配替换
      let styL, styT;

      // 注意在ie中 第一次获取到的值为组件自带50% 移动之后赋值为px
      if (sty.left.includes("%")) {
        styL =
          +document.body.clientWidth * (+sty.left.replace(/\%/g, "") / 100);
        styT =
          +document.body.clientHeight * (+sty.top.replace(/\%/g, "") / 100);
      } else {
        styL = +sty.left.replace(/\px/g, "");
        styT = +sty.top.replace(/\px/g, "");
      }

      document.onmousemove = function (e) {
        // 通过事件委托，计算移动的距离
        const l = e.clientX - disX;
        const t = e.clientY - disY;

        // 移动当前元素
        dragDom.style.left = `${l + styL}px`;
        dragDom.style.top = `${t + styT}px`;

        //将此时的位置传出去
        //binding.value({x:e.pageX,y:e.pageY})
      };

      document.onmouseup = function (e) {
        document.onmousemove = null;
        document.onmouseup = null;
      };
    };
    dialogHeaderEl.onmousedown = moveDown;
    //双击头部效果
    let margin;//
    dialogHeaderEl.ondblclick = (e) => {
      if (isFullScreen == false) {
        margin = dragDom.style.margin;//
        nowHight = dragDom.clientHeight;
        nowWidth = dragDom.clientWidth;
        nowMarginTop = dragDom.style.marginTop;
        dragDom.style.left = 0;
        dragDom.style.top = 0;
        dragDom.style.height = "100VH";
        dragDom.style.width = "100VW";
        dragDom.style.margin = "0px";
        dragDom.style.marginTop = 0;
        isFullScreen = true;
        dialogHeaderEl.style.cursor = "initial";
        dialogHeaderEl.onmousedown = null;
      } else {
        dragDom.style.margin = margin;//
        dragDom.style.height = "auto";
        dragDom.style.width = nowWidth + "px";
        dragDom.style.marginTop = nowMarginTop;
        isFullScreen = false;
        dialogHeaderEl.style.cursor = "move";
        dialogHeaderEl.onmousedown = moveDown;
      }
    };

    //拉伸
    let resizeEl = document.createElement("div");
    dragDom.appendChild(resizeEl);
    //在弹窗右下角加上一个10-10px的控制块
    resizeEl.style.cursor = "se-resize";
    resizeEl.style.position = "absolute";
    resizeEl.style.height = "10px";
    resizeEl.style.width = "10px";
    resizeEl.style.right = "0px";
    resizeEl.style.bottom = "0px";
    //鼠标拉伸弹窗
    resizeEl.onmousedown = (e) => {
      // 记录初始x位置
      const clientX = e.clientX;
      console.log(clientX);
      // 鼠标按下，计算当前元素距离可视区的距离 减去resizeEl宽高防止鼠标超出弹框
      const disX = e.clientX - resizeEl.clientWidth - resizeEl.offsetLeft;
      const disY = e.clientY - resizeEl.clientHeight - resizeEl.offsetTop;

      document.onmousemove = function (e) {
        e.preventDefault(); // 移动时禁用默认事件

        // 通过事件委托，计算移动的距离
        const x = e.clientX - disX + (e.clientX - clientX); //这里 由于elementUI的dialog控制居中的，所以水平拉伸效果是双倍
        const y = e.clientY - disY;
        //比较是否小于最小宽高
        dragDom.style.width = x > minWidth ? `${x}px` : minWidth + "px";
        dragDom.style.height = y > minHeight ? `${y}px` : minHeight + "px";
      };
      //拉伸结束
      document.onmouseup = function (e) {
        document.onmousemove = null;
        document.onmouseup = null;
      };
    };
  },
});

/*4  v-dialogResize: 弹窗宽度拖大 拖小 */
Vue.directive("color", {
  // 当被绑定的元素插入到 DOM 中时……
  inserted: function (el) {
    // 聚焦元素
    el.style.color = 'blue';
  },
});
